Two unidentified Marines of VMB-613 perform engine maintenance work on the starboard engine of a PBJ-1H on Kwajalein.  Note the unpainted leading edge of the wing, indicating that this photograph was taken late in the war.  Through the efforts of the Engineering Department, no VMB-613 aircraft was lost overseas due to mechanical malfunctions.     

Photograph: Marine Bombing Squadron Six-Thirteen (via Charles F. Knapp)